Block for use in dieing out and similar machines



Patented Aug. 31, 1937 UNITED STATES PATENT OFFICE Frederick R.Woodward,

Woodward and William F. Bacon,

Mass, executors of s ward, deceased No Drawing. Appli Mass; Edith B.Newton, aid Frederick R. Wood- Newton,

cation June 29, 1935,

Serial No. 29,030

'1 Claims.

The principal purpose of my invention is to provide a block for dieingout machines, or clicking machines, or beam die cutters, or similarmachines in which a cutting member acts on material which is usuallysupported by a plurality of such blocks. Heretofore the blocks have beenmade of wood as disclosed for example in the patent to Shea No.1,513,938 dated November 4, 1924, and these blocks, unless covered by aslab of some sort, would be cut into and soon become uneven and unfitfor use, especially for fine Work. I construct the blocks themselves ofsuch material that they will resist the cutting action of the cuttingmember and I thus do away with the necessity of any slab or othercovering member. The wooden blocks chip and powder off and have to beplaned off very frequently to make theirsurface smooth with the resultthat the blocks have ultimately to be replaced. With my invention I doaway with the use of any covering slab for the blocks and this isbecause I make my blocks, preferably resting on end, of material whichwill resist the cutting action of the cutting member and consequently Isave the expense of a covering slab and the expense of frequent planingor smoothing of the wooden blocks and the expense of replacing thewooden blocks. My blocks are slightly resilient and are self-healing,that is to say, my material, after being slightly displaced by thecutting member will, on account of its nature, tend to resume its normalcondition and the surface of the block will automatically tend tobecome, and remain, smooth with the result that extremely infrequentsmoothing will keep the surface of the block in perfect condition foruse.

My block is a homogeneous mass comprising, preferably, about 75% of avegetable product, preferably sulphite pulp, which is a pulp commonlymade from wood or other vegetable product by the action of sulphur or asulphur compound, the rest of said mass consisting of a more or lessresilient binder such as, rubber compound, rubber cement, rubber latexor resin, preferably an oily resin. I mix the parts, just referred to,preferably with an accelerator to aid vulcanizing. When the ingredientshave been mixed so as to become a thoroughly homogeneous mass; thelatter is preferably pressed under hydraulic pressure until it is of thedesired density and then vulcanized to the desired hardness, thishardness being such as to furnish proper resistance to the cuttingmember.

If it is desired to use a plurality of my blocks they may be heldtogether in any suitable way as by an encircling band such as appears insaid Shea patent.

What I claim is:

1. A block having a portion to be engaged by the cutting member of amachine of the character described, said portion comprising ahomogen-eons mass of short individualized fibres of vegetable materialthoroughly commingled With and united by a binder of resilient material.

2. A block having a portion to be engaged by the cutting member of amachine of the character described, said portion comprising ahomogeneous compacted mass of short individualized fibres of vegetablematerial thoroughly commingled with and united by a resilient binder ofvulcanized material 3. A block having a portion to be engaged by thecutting member of a machine of the character described, said portionbeing a homogeneous mass consisting of substantially 75% of sulphitepulp and substantially 25% of a resilient binder for said pulp.

4. A block having a portion to be engaged by the cutting member of amachine of the character described, said portion being a homogeneousmass of wood pulp and rubber compound.

5. A block having a portion to be engaged by the cutting member of amachine of the character described, said portion being a homogeneousmass of wood pulp and rubber latex.

6. A block having a portion to be engaged by the cutting member of amachine of the character described, said portion being a homogeneousmass of wood pulp and resin.

7. A block for dieing out machines being a homogeneous mass consistingof substantially 75% of sulphite pulp and substantially 25% of rubberlatex.

FREDERICK R. WOODWARD.

